Final answer:
President Roosevelt's diplomacy affected Latin America and Asia, improving relations and securing peace in these regions.
Step-by-step explanation:
President Roosevelt's diplomacy affected several regions. In Latin America, his policies, known as the Good Neighbor Policy, aimed to promote non-intervention and cooperation with neighboring nations. This had a widespread effect throughout the region and helped to improve relations between the United States and Latin American countries. In Asia, Roosevelt played a role in mediating the Russo-Japanese War and securing peace in the region, which had implications for China and American access to markets.